registry: Fix error handling in the registry loader
registry: Fix error handling in the registry loader

When the plugin-scanner load fails (because the helper can't be
spawned), make sure to load the plugin that failed in-process, so
that all plugins do get loaded.

jpakkane/gstreamer,lovebug356/gstreamer,ylatuya/gstreamer,StreamUtils/gstreamer,justinjoy/gstreamer,justinjoy/gstreamer,shelsonjava/gstreamer,shelsonjava/gstreamer,surround-io/gstreamer,ensonic/gstreamer,ahmedammar/platform_external_gst_gstreamer,krieger-od/gstreamer,Distrotech/gstreamer,krieger-od/gstreamer,ylatuya/gstreamer,lubosz/gstreamer,cfoch/gstreamer,cablelabs/gstreamer,drothlis/gstreamer,cfoch/gstreamer,krieger-od/gstreamer,shelsonjava/gstreamer,surround-io/gstreamer,lovebug356/gstreamer,cablelabs/gstreamer,lubosz/gstreamer,ensonic/gstreamer,lovebug356/gstreamer,shelsonjava/gstreamer,krichter722/gstreamer,mparis/gstreamer,drothlis/gstreamer,Distrotech/gstreamer,collects/gstreamer,jpxiong/gstreamer,surround-io/gstreamer,mrchapp/gstreamer,centricular/gstreamer,ylatuya/gstreamer,Distrotech/gstreamer,cablelabs/gstreamer,mrchapp/gstreamer,krieger-od/gstreamer,Distrotech/gstreamer,Lachann/gstreamer,lubosz/gstreamer,collects/gstreamer,Lachann/gstreamer,jpakkane/gstreamer,krieger-od/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,lovebug356/gstreamer,lubosz/gstreamer,collects/gstreamer,jpakkane/gstreamer,ahmedammar/platform_external_gst_gstreamer,cablelabs/gstreamer,mparis/gstreamer,surround-io/gstreamer,krichter722/gstreamer,drothlis/gstreamer,collects/gstreamer,ylatuya/gstreamer,ylatuya/gstreamer,cablelabs/gstreamer,mrchapp/gstreamer,krichter722/gstreamer,ahmedammar/platform_external_gst_gstreamer,magcius/gstreamer,magcius/gstreamer,ensonic/gstreamer,magcius/gstreamer,surround-io/gstreamer,justinjoy/gstreamer,mparis/gstreamer,drothlis/gstreamer,magcius/gstreamer,centricular/gstreamer,collects/gstreamer,cfoch/gstreamer,ensonic/gstreamer,mrchapp/gstreamer,mparis/gstreamer,krichter722/gstreamer,jpxiong/gstreamer,centricular/gstreamer,drothlis/gstreamer,ensonic/gstreamer,StreamUtils/gstreamer,cfoch/gstreamer,StreamUtils/gstreamer,jpakkane/gstreamer,Distrotech/gstreamer,cfoch/gstreamer,Lachann/gstreamer,Lachann/gstreamer,justinjoy/gstreamer,ahmedammar/platform_external_gst_gstreamer,centricular/gstreamer,jpxiong/gstreamer,Lachann/gstreamer,krichter722/gstreamer,lovebug356/gstreamer,lubosz/gstreamer,mrchapp/gstreamer,StreamUtils/gstreamer,mparis/gstreamer,jpxiong/gstreamer,ahmedammar/platform_external_gst_gstreamer,jpakkane/gstreamer,magcius/gstreamer,jpxiong/gstreamer,justinjoy/gstreamer,shelsonjava/gstreamer